Implemented Feature for using Config Files

[AmasiaNalbandian]

closes #10

Summary

I wrote a function to parse the json passed for the config file with a config flag. The function will take the values in the file and push them into the options to then continue creating the files as done previously in the code.

Steps to test:

1. Use the following instructions from the readme to set up the program, until you reach the steps for running the program.
2. Create a json file with the following flags:

{
	"input": "text.txt",
	"lang": "fr",
	"output": "./examples"
}

You can test without the lang and output file. You can also mix-up the order of the properties.
3. Run the command: ./yassgy.exe --config <file>
4. Look into the folder you set for the output, otherwise look into the dist folder.

[JerryHue]

This is great!

Could you update the README to include this feature?

[JerryHue]

Great!